He has a PhD, has worked on international space programs, has been a noted academic on three continents and is a globally recognised expert in his field all before the age of 40.

Yet for all of his achievements so far, I could see that he had a crisis of confidence.

When I asked him why that was, he explained that he wishes that he had done more with his life.

When he compared himself with other PhD students from his university days, he felt as though they had achieved more. They had more papers published, more prestigious job titles and had worked on higher profile projects.